I found this in a news group, If anyone is interested reply directly
to the originator.
Joe
In comp.sys.intel.ipsc310, <dkitchen(a)hotmail.com> wrote:
>Anyone interested in a possible donation of an Intel IPSC 860 SuperComputer,
>a spare chassis, and many, many related spare parts & boards, along with a
>ton of software and manuals please contact me. We used these for digital
>video processing but the nature of digital video has changed along with the
>ease of processing with modern computing systems has made this obsolete for
>digital video applications.
>
>Again, we are willing to donate this to the organization the will give it
>proper care and feeding. Otherwise it will be in a landfill in the near
>future. Yes, you have to pay all shipping and transport costs or pick it up
>in Southern California.
>
>Please contact me at dkitchen(a)hotmail.com
>
>
>
From: Richard Erlacher <edick(a)idcomm.com>
>Has anybody got good logic analyzer pictures of the signals on the S-100
>driven by the really early 8080 CPU cards? I'm looking to get a
reference
Real simple start with a schematic of the MITS 8080 or IMSAI 8080 CPU
card
so you get to see how much buffering (mostly and only) and combinational
logic applied to some signals (nearly none). Then get an 8080 datasheet,
that IS THE TIMING for early S100.
All of the later Z80, 6502, 6800, LSI-11, TI9900, COSMAC, 8085 and
808X to name a few boards tried to approximate that timing (before it
morphed to IEE696) with combinational logic.
Allison
--- John Lawson <jpl15(a)panix.com> wrote:
> Basically, the yoke coil is calculated to 'ring' at a certain frequency...
> ...The circuit is designed so that at that freq, the yoke is in resonance,
> and therefore uses less current to get the job done; hence less wire and
> lighter, cheaper parts... it begins to draw large amounts of power trying to
> do the same work, and, in a lot of the 'cheap' monitors, the whole thing
> actually overheats and burns up while you are looking at the jagged lines
> and trying to figure out what to do next.
We lost a 19" Dell monitor (not cheap) at work last year when our Webguy
punched in an unfortunate refresh rate and didn't hit test first. I wasn't
there at the time, but my two buddies in IT who were in his cube (but facing
away at the time) said the flash was impressive.
> ALSO: Long ago in the Big Iron days... the were some machines in the
> Philco line whose power supplies in some configs were marginally
> inadequate. It was possible to load the machine (with programs and data)
> and trip (or burn) the power units...
I heard about someone who disassembled a "worst-case" memory diagnostic for
some DEC machine with core, perhaps the PDP-8, perhaps some other 1960's
model. He calculated that the program did not, in fact, perform a worst-
case test for memory access/data loss. He described his ideas to improve
the program to a Digit (DEC employee) who was familiar with the hardware
and software in question. The curious customer was warned against implementing
his idea because it was already known that a true worst-case scenario would
result in too much current being drawn through the core stack, causing
serious thermal problems if left to run for extended periods of time.
Also, there were programs in the days if Big Iron to abuse hardware built
with a particular duty cycle in mind, print hammers coming to mind. One
I was told about by the perpetrator was simple and fiendish - he analyzed
the pattern of letters on the band and devised a print line that caused all
the hammers to trip at once, rather than the usual 10%-20% that fired when
ordinary text was printed. The resulting current drain from a relatively
small number of lines of this, fried the power supply.
Then there's the practice of writing disk diagnostics that take advantage
of harmonic oscillations when the drive's voice coil is slammed from inner
to outer track, causing the drive to walk across the room. There are stories
of this happening entirely due to heavy usage and disk thrashing, not just
college pranksters seeing what the limits of physics are.
Disks that weight one kg. and inkjet printers just aren't as much fun as the
older stuff, one might think.
-ethan
=====
Even though my old e-mail address is no longer going to
vanish, please note my new public address: erd(a)iname.com
The original webpage address is still going away. The
permanent home is: http://penguincentral.com/
See http://ohio.voyager.net/ for details.
__________________________________________________
Do You Yahoo!?
Get email at your own domain with Yahoo! Mail.
http://personal.mail.yahoo.com/
I'm using a Toshiba and works great. Tried several sanyos, and even
a Cdburner (scsi) all worked.
Allison
-----Original Message-----
From: THETechnoid(a)home.com <THETechnoid(a)home.com>
To: classiccmp(a)classiccmp.org <classiccmp(a)classiccmp.org>
Date: Sunday, January 21, 2001 11:17 AM
Subject: Re: CD-ROM drive for VAXstation 3100 Model 76
>I tried several drives from different makers. All were 512byte
jumperable
>and would boot backup from the cd, but when you try to perform the
>restore, the system bombs.
>
>After about a week of diddling, I went and got an RRD40. Slower than
>molassis in January, but it works and the others didn't.
>
>Regards,
>
>Jeff
>
>P.S. From experience, you don't NEED a caddy for an RRD40. I don't
have
>one either. I just opened the drive and replaced the disk already
inside
>it with my VMS install cd. You need at least the horseshoe part of the
>caddy, but not the whole thing.
>
>
>Regards,
>
>Jeff
>
>In <20010119.235201.307.0.william.webb(a)juno.com>, on 01/21/01
> at 11:01 AM, William W Webb <william.webb(a)juno.com> said:
>
>>Fred, do a search for RRD40/42/43. These are the original DEC CD-ROM
>>drives that I absolutely positively know will work with these boxes-
they
>>are jumperable to do 512 or 2048 byte sectors. (VMS requires drives
that
>>do 512.)
>
>>RRD40s are really old and need a caddy.
>
>>You might be interested to know that I've got the Owner's Guide for the
>>VAXstation 3100 Model 76 online at:
>
>>http://www.whiteice.com/~williamwebb/intro/DOC-i.html
>
>>I'm considering doing the VAXstation 4000 VLC manual next, but only if
>>there's a demand for it since that much HTML pretty much by hand is a
>>real bitch.
>
>>William W. Webb
>
>>I don't know if it's outside of the scope of this mailing list to talk
>>about things for sale, but I've got hold of some old 64 x 64 bit core
>>frames that would look really nice in a shadowbox or under glass as a
>>desktop doodad.
>>Mfr. Lockheed Electronics Corp.
>
>>I can also lay my hands on a 4K module (9 frames with diode arrray
>>connector cards)
>
>>If anybody's interested, drop me an email and we'll talk about price.
>
>>Apologies in advance if I've transgressed.
>>________________________________________________________________ GET
>>INTERNET ACCESS FROM JUNO!
>>Juno offers FREE or PREMIUM Internet access for less!
>>Join Juno today! For your FREE software, visit:
>>http://dl.www.juno.com/get/tagj.
>
>--
>-----------------------------------------------------------
>Jeffrey S. Worley
>President
>Complete Computer Services, Inc.
>30 Greenwood Rd.
>Asheville, NC 28803
>828-277-5959
>Visit our website at HTTP://www.Real-Techs.com
>THETechnoid(a)home.com
>-----------------------------------------------------------
>
>
Hi
I dont collect DEC/VAX stuff but I have one of these here.
Cant tell ya if it works. But takes the CD in and ejects, led seems to behave normally.
I dont have the original caddy.
Someone told me to keep it for him but have not heard from him in a very long time...I cant recall who, perhaps he will read this and put his hand up...
I picked it up when I had the opportunity to empty out a VAX8350 of all its 13 boards (free for cost of shipping given away here on mailing list)
Would love to make someone happy. I have no use for this. Most probably will go into garbage soon if no takers...I have idea of its value.
Would accept a trade for anything micro 8-16 bits 197x-198x early 1990s that I could add to my collection.
See my current list at : http://computer_collector.tripod.com
Claude
Canuk Computer Collector
I'm considering doing the VAXstation 4000 VLC manual next
It being the most ubiquitous box and one that takes regular 4mb simms and has a big hdd, and one that is supported on the latest netBSD V 1.5, do that! And link both pages (the 3100/76 and the 4000VLC manual) to the netbsd.org site, please, I would like to encourage yo to do it! Certainly your 3100/76 Manual is excellent work, it was very helpful to me, Jeff, a big THANK YOU.It matches nicely the www.vaxarchive.org/hw/vs3100/index.html
Do you have also the VT 1300 Manual?
Or even better: The VRE01 Manual? VRE01 being that flatpanel display (see attached!) that works on the b/w mono card in 1-bit mode I guess, not 8-bit (GPX vs SPX)
My 4000VLC's have all the fancy 256 colour framebuffer (?) and no b/w only provision, so I guess I cannot use them for that monitor unfortunaley.A good set of pix can be found on www.terrigal.net.au/~acms/album/h10002.jpg
Again: Thanks.
As to the CD I found a cr 503b = compaq 142223-201 that is listed as compatible.....lets hope it does the trick.
Fred
Fred, do a search for RRD40/42/43. These are the original DEC CD-ROM
drives that I absolutely positively know will work with these boxes- they
are jumperable to do 512 or 2048 byte sectors. (VMS requires drives that
do 512.)
RRD40s are really old and need a caddy.
You might be interested to know that I've got the Owner's Guide for the
VAXstation 3100 Model 76 online at:
http://www.whiteice.com/~williamwebb/intro/DOC-i.html
I'm considering doing the VAXstation 4000 VLC manual next, but only if
there's a demand for it since that much HTML pretty much by hand is a
real bitch.
William W. Webb
I don't know if it's outside of the scope of this mailing list to talk
about things for sale, but I've got hold of some old 64 x 64 bit core
frames that would look really nice in a shadowbox or under glass as a
desktop doodad.
Mfr. Lockheed Electronics Corp.
I can also lay my hands on a 4K module (9 frames with diode arrray
connector cards)
If anybody's interested, drop me an email and we'll talk about price.
Apologies in advance if I've transgressed.
________________________________________________________________
GET INTERNET ACCESS FROM JUNO!
Juno offers FREE or PREMIUM Internet access for less!
Join Juno today! For your FREE software, visit:
http://dl.www.juno.com/get/tagj.
Goldarg <goldarg(a)dub.net> wrote:
> I recently got a AT&T SCSI drive from a friend and wanted to see if I could
> Model: 97536DA
> Option: STD
> Ser No: 3001a97212
> Handle With Care
>From the model and serial number, I'd guess that this drive was
made by Hewlett-Packard in the first week of 1990. Those look
like HP model and serial numbers.
http://www.tame.com/hp/hpinfo.htm suggests that a 97536DA is a
330MB ESDI disk drive, OEM version.
If you think it's SCSI, I wouldn't be surprised that it is
high-voltage differential SCSI; HP did that sort of thing.
-Frank McConnell
I took at bunch of pictures of the inside and outside of the 4170 today.
I'm posting them to "http://www.intellistar.net/~rigdonj/tek-4170/".
There's no text there, only pictures at the moment, so you'll have to be
satisfied with looking at the pictures for the time being. I hope to put up
a page tomorrow with links and some descriptions.
I also scanned the page that describes the 4170 in the 1985 Tektronix
catalog and posted it there as well.
I *think* I may have found the right serial cable to connect it to the
terminal today but I also found that my only Tektronix terminal is acting
peculiar (it won't let me into the set up mode!) I'll try hooking up the
terminal tomorrow and if it doesn't work then I'll have to go look for
another terminal.
Keeping my fingers crossed!
Joe
